Starter for electric motors



Feb. 9,1926. M 1,572,804

I c. LEY

STARTER FOR ELECTRIC MOTORS Filed March 28 1925 1771 31; 3 7 C. A 7, I

Patented Feb. 9, 1925.

NITE STATES ?A l"Ef\ 'i OFFHZE.

CHRISTIAN LEY, OF GLAUoI-LAU, GEBTVIANY,ASSIG1\TOR TO THE FIRM OF ALOSAP- GESELLSGHAFT MIT BESGI-IB-ANKTEE HAFTUNG, OF GLAUCHAU,

STARTER FOR ELECTRIC MOTORS.

Application filed March 28, 1825. Serial No. 19,099.

To all whom it may concern.

Be it known that T, Cr-nusrmn Lnr, a citizen of Germany, residing atGlauchau, Germany, have invented certain new and useful improvements inStarters for Electric Motors, or" which the following is aspecification.

The present invention refers to a starter for one phase-, two phase-,and three phasealternating current motors and for continu one currentmotors, which has the advantage over the starters known heretofore inthat between the handle and the contact lever an insulating disk isiinroduced, which may have any size and be of any thickness for giving agood protection at any strength oi? current and tension withoutimpairing the insulating effect by screws or bolts, because theconnection between the handle and the insulating disk as well as theconnection between the contact carrier and the insulating disk is solelyproduced by coupling or engaging members, which in a manner known per secan be brought out of contactby movementin an axial direction, so thatthe complete starter can be taken apart and put together again.

In the drawing by way of example a starter is shown.

Fig. 1 is an elevation of a starter parts being shown in section; v

Fig. 2 is a plan View of the same.

In the drawings, fixed contact laminations 1 are mounted on a base plate2, from which rises a fixed spindle 3 having screw-threads its lower endfor nuts 1, by which the spindle 3 is fastened to the plate 2. On thisspindle a hand wheel 5 is rotatably mounted, the boss 6 of which has atits lower end a laterally flattened or square part 7. Moreover, on thespindle 3 an insulating disk 8 is rotatably mounted, which by the aid ofcoupling members or pins 9 engages notches 10 in a cap 11, which at theupper part has a square hole to engage the square part 7 ot the handwheel. The lower face of the insulating disk 8 rests on a movablecontact carrier comprising a ring 13 surrounding the spindle at adistance and three 90 radial arms 12 projecting from said ring andadapted to slide with their contact faces 14 over the laminations 1 onthe base plate. The ring 13 or" the contact carrier 12, is provided withpins 15, which engage in corresponding perforations in the lower surfaceof the member 8. lVithin the cap 11 is a spiral spring 16, which bearsagainst the upper surface of the disk 8 and against the lower face ofthe top wall at the cap 11, which is prevented from moving upwardly bythe boss 6 of the hand wheel. When the starter is mounted as shown inthe drawing the spring 16 is tensione'd. The upward movement or the handwheel and thus of all moors below and engaging one another is preventedby a pin or plug 17 projecting through the upper end of the spindle.

It will be well understood, that, when the pin 17 is removed, first thehand wheel 5 and thereupon the cap 11, the spiral spring 15, the disk 8and the contact carrier 12, 13 can be removed trom the spindle one afterthe other. Nevertheless, when assembled, a good contact pressure will beattained between the contact' faces 1 1 of the arms 12 and thelaminations 1 at any time.

Tn the construction shown the lamina tions 1 are arranged in threegroups. Also the insulating disk 8 is provided on its periphery with twomore contact pieces 19 fastened by screws 18 and connected with oneanother by a copper bar 20. These contact pieces 19 serve tor switchingin and out the auxiliary phase. They are connect ed to the insulatingdisk 8 and can contact, while rotating therewith, with fixed Contactpieses 21, which by the aid of suitably bent springs are attached toangle pieces 23, which are connected by screws between two groups of thelam' tions 1 to the base plate The current is fed to the laminations 1the angular arms 23 by the aid :lllti of screws passing through the baseplate two nuts being placed on each of these screw-s tor firmlyfastening them to the base plate. The rotation oi the contact arms 12 islimited b stops 2b in such a manner that each arm is adapted to moveonly over one group of laminations.

It is not absolutely necessary to iii: the spindle 3 as it may also berotatable together with all the parts mounted thereon, while the baseplate 2 is held fast. The divers means tor coupling may be construct-edin a di'l'lercnt manner from that shown, so long as after removing thepin 17 or similar lock ing means, the divers members can be taken oil ofthe spindle.

The starter as shown and described is well adapted for use in connectionwith slide ring motors driven by a onephase alternating current. Byreplacing the insulating disk 8 by a smaller disk which is not providedon the circumference with contact faces serving for switching in or outthe auxiliary phase the starter is adapted for a slide-ring-motor drivenby a throcphase alternating current. By switching or shunting oii' onegroup of laminations the starter is converted into a twophase-starter.

I claim:

1. A starter for electric motors, comprising, a base plate carryingstationary contacts, a spindle attached to the base plate, a handle, aninsulating disk and a contact carrier rotatable about the spindle, thecontact carrier including a ring surrounding the spindle at a distanceand carrying contact arms for sliding over the stationary contacts,coupling members on the contact carrier for engaging the insulating diskfrom below, a single centrally arranged spring exerting central pressureon the upper surface of the insulating disk when the starter isassembled, a cap embracing the spring and provided with notches,coupling members on the upper face of the insulating disk engaging thenotches in the cap, and

means causing the cap and handle to rotate together.

2. A starter for electric motors, comprising, a base plate carryingstationary contacts, a spindle attached to the base plate, a handle, aninsulating disk and a contact carrier rotatable about the spindle, thecontact carrier including a ring surrounding the spindle at a distanceand carrying contact arms for sliding over the stationary contacts,coupling members on the contact carrier for engaging the insulating diskfrom below, a single centrally arranged spring exerting central pressureon the upper surface of the insulating disk when the starter isassembled, a cap embracing the spring and provided with notches,coupling members on the upper face of the insulat in; disk engaging thenotches in the cap, and means causing the cap and handle to rotatetogether, fixed springy contact pieces connected to the base, andcontact pieces on the periphery of the insulating disk arranged tocontact with the fixed springy contact pieces, rotation of the handlecausing simultaneous operation of the contact carrier and of theperipheral contact pieces.

CHRISTIAN LEY.

